<?php

namespace App\Services\Admin\Manage;

use App\Models\Invoice;
use App\Services\Concerns\LogsFormHistory;
use App\Settings\SystemSettings;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\DB;

class InvoiceService
{
    use LogsFormHistory;

    public function paginated(int $perPage = 25, string $search = '', string $sort = 'created_at', string $direction = 'desc', array $filters = []): LengthAwarePaginator
    {
        $itemsCountQuery = '(SELECT COUNT(*) FROM invoice_items WHERE invoice_items.invoice_id = invoices.id)';

        return Invoice::query()
            ->select(['id', 'invoice_number', 'customer_name', 'amount', 'date', 'due_date', 'status', 'description'])
            ->selectRaw("{$itemsCountQuery} as items_count")
            ->when($search, fn ($q) => $q->where(function ($query) use ($search) {
                $query->where('invoice_number', 'like', "%{$search}%")
                    ->orWhere('customer_name', 'like', "%{$search}%");
            }))
            ->orderBy($sort, $direction)
            ->paginate($perPage);
    }

    public function getForEdit(Invoice $invoice): array
    {
        $invoice->load('items');

        return [
            'id' => $invoice->id,
            'invoice_number' => $invoice->invoice_number,
            'customer_name' => $invoice->customer_name,
            'customer_phone' => $invoice->customer_phone,
            'customer_address' => $invoice->customer_address,
            'date' => $invoice->date->format('Y-m-d'),
            'due_date' => $invoice->due_date?->format('Y-m-d'),
            'status' => $invoice->status->value,
            'description' => $invoice->description,
            'items' => $invoice->items->map(fn ($item) => [
                'id' => $item->id,
                'name' => $item->name,
                'quantity' => $item->quantity,
                'price' => $item->price,
            ]),
        ];
    }

    public function getForPrint(Invoice $invoice): array
    {
        $invoice->load('items');
        $settings = app(SystemSettings::class);

        return [
            'id' => $invoice->id,
            'invoice_number' => $invoice->invoice_number,
            'customer_name' => $invoice->customer_name,
            'customer_phone' => $invoice->customer_phone,
            'customer_address' => $invoice->customer_address,
            'amount' => $invoice->amount,
            'formatted_amount' => $invoice->formatted_amount,
            'formatted_date' => $invoice->formatted_date,
            'formatted_due_date' => $invoice->formatted_due_date,
            'status' => $invoice->status->value,
            'status_label' => $invoice->status_label,
            'description' => $invoice->description,
            'items' => $invoice->items->map(fn ($item) => [
                'id' => $item->id,
                'name' => $item->name,
                'quantity' => $item->quantity,
                'price' => $item->price,
                'subtotal' => $item->subtotal,
            ]),
            'company' => [
                'name' => $settings->app_name,
                'address' => $settings->address,
                'email' => $settings->email,
                'phone' => $settings->phone,
            ],
        ];
    }

    public function store(array $data): Invoice
    {
        return DB::transaction(function () use ($data) {
            $now = now();
            $amount = 0;
            $itemRows = $this->buildItemRows($data['items'], $now, $amount);

            $invoice = Invoice::create([
                'invoice_number' => $data['invoice_number'],
                'customer_name' => $data['customer_name'],
                'customer_phone' => $data['customer_phone'] ?? null,
                'customer_address' => $data['customer_address'] ?? null,
                'amount' => $amount,
                'date' => $data['date'],
                'due_date' => $data['due_date'] ?? null,
                'status' => $data['status'],
                'description' => $data['description'] ?? null,
            ]);

            foreach ($itemRows as &$row) {
                $row['invoice_id'] = $invoice->id;
            }
            DB::table('invoice_items')->insert($itemRows);

            $this->logCreated($invoice, 'Invoice', [
                'Nomor Invoice' => $invoice->invoice_number,
                'Nama Pelanggan' => $invoice->customer_name,
                'Jumlah' => $invoice->amount,
                'Status' => $invoice->status->value,
            ]);

            return $invoice;
        });
    }

    public function update(Invoice $invoice, array $data): Invoice
    {
        return DB::transaction(function () use ($invoice, $data) {
            $oldValues = [
                'Nomor Invoice' => $invoice->invoice_number,
                'Nama Pelanggan' => $invoice->customer_name,
                'Jumlah' => $invoice->amount,
                'Status' => $invoice->status->value,
            ];

            $invoice->items()->delete();

            $now = now();
            $amount = 0;
            $itemRows = $this->buildItemRows($data['items'], $now, $amount);

            foreach ($itemRows as &$row) {
                $row['invoice_id'] = $invoice->id;
            }
            DB::table('invoice_items')->insert($itemRows);

            $invoice->update([
                'invoice_number' => $data['invoice_number'],
                'customer_name' => $data['customer_name'],
                'customer_phone' => $data['customer_phone'] ?? null,
                'customer_address' => $data['customer_address'] ?? null,
                'amount' => $amount,
                'date' => $data['date'],
                'due_date' => $data['due_date'] ?? null,
                'status' => $data['status'],
                'description' => $data['description'] ?? null,
            ]);

            $this->logUpdated($invoice, 'Invoice', $oldValues, [
                'Nomor Invoice' => $invoice->invoice_number,
                'Nama Pelanggan' => $invoice->customer_name,
                'Jumlah' => $invoice->amount,
                'Status' => $invoice->status->value,
            ]);

            return $invoice;
        });
    }

    public function destroy(Invoice $invoice): bool
    {
        return DB::transaction(function () use ($invoice) {
            $this->logDeleted($invoice, 'Invoice', [
                'Nomor Invoice' => $invoice->invoice_number,
                'Nama Pelanggan' => $invoice->customer_name,
                'Jumlah' => $invoice->amount,
                'Status' => $invoice->status->value,
            ]);

            $invoice->items()->delete();

            return $invoice->delete();
        });
    }

    private function buildItemRows(array $items, $now, int &$amount): array
    {
        return collect($items)->map(function ($item) use ($now, &$amount) {
            $quantity = (int) $item['quantity'];
            $price = (int) $item['price'];
            $subtotal = $quantity * $price;
            $amount += $subtotal;

            return [
                'invoice_id' => null,
                'name' => $item['name'],
                'quantity' => $quantity,
                'price' => $price,
                'subtotal' => $subtotal,
                'created_at' => $now,
                'updated_at' => $now,
            ];
        })->toArray();
    }
}